Pen cap



FIG. 1 is a perspective view of a pen cap showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a right end view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is an enlarged partial view of FIG. 2, taken along Line 7—7;

FIG. 8 is a sectional view of FIG. 5, taken along Line 8—8;

FIG. 9 is an enlarged sectional view of FIG. 5, taken along Line 9—9; and,

FIG. 10 is an enlarged sectional view of FIG. 8, taken along Line 10—10.

The broken lines showing environment are included for information purposes only and form no part of the claimed design. 

The ornamental design for a pen cap, as shown and described. 